Jon Gustafson and Peter Nicholls write that he is "known as much for his astronomical paintings in the accurate tradition of Chesley Bonestell as for his sf work... Some of his best early work was to illustrate a nonfiction book by Patrick Moore, Sun, Myth [sic], and Men (1954)." Gustafson and Nicholls remark that The Magazine of Fantasy and Science Fiction was "the magazine for which he developed his famous "Space Gumby," a green alien which lent humour to his vivid astronomical scenes. He was an important artist for Vision of Tomorrow and worked also for Science Fiction Monthly, If and Gal."[2]